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NWV 3302 Features

• Under / Over Voltage sensing
• Adjustable alarm levels
• Compact enclosure
• No separate power supply required

 

 

 

NWV 3302 Under/Over Voltage Relay

The NWV 3302 monitors for under/over voltage on ac 3 phase circuits + Neutral. The relay monitors the voltage between each phase and neutral using three independent measuring circuits. The unit measures these values and trips on either under or over voltage depending upon the preset trip points. The NWV 3302 will also trip if only one phase experiences one of these conditions. The NWV 3302 draws its power from the line voltage. Please state when ordering. The unit has 2 NO/NC alarm relay contacts which operate in failsafe mode.

Under Voltage

When the voltage is greater than the preset Y1 and less than the preset Y2, the output relay K1 is energized and the green LED is lit. If the voltage on any one phase drops below the preset value of Y1, then the red LED will light up and the output relay will be activated. The output relay returns to normal operation once all phases return to normal voltage range + 3% (trip point + fixed hysteresis).

Over Voltage

When the voltage is lower than the preset Y2 and greater than the preset Y1, the output relay K1 is energized and the green LED is lit. If the voltage on any one phase rises above the preset value of Y2, then the red LED will light up and the output relay will be activated. The output relay returns to normal operation once all phases return to normal voltage range - 3% (trip point - fixed hysteresis).


Do you have a ground fault application?

We can help.

Contact us by phone or fax: 972-370-0664

Legend
H1           LED green POWER ON
H2           LED red FAULT

K1           alarm relay

Y1           Under voltage trip
Y2           Over voltage trip

Terminals
11-12-14   Contact for K1 alarm relay
21-22-24   Contact for K1 alarm relay


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